Centrifugal pump



Jan. 18, 1949. Y J. A. ESPY 2,459,220

CENTRIFUGAL PUMP Filed Dec 15, 1945 2 Sheets-Sheet 1 I L/ZZW 19. 55,63.

Ja 1a, 1949.

J A. ESPY CENTRIFUGAL PUMP 2 Sheets-Sheet 2 Filed Dec. 15, 1945 Patented Jan. 18, 1949 2,459,220 CENTRIFUGAL PUMP John A. Espy, Buechel, Ky.

Application December 1 3 Claims.

This invention relates to pumps and more particularly to a rotary pump.

The primary object of the invention is to deliver a stream of water under pressure from any suitable source.

Another object of the invention is to simplify the construction of pumps of this character and yet preserve the eiiiciency thereof.

Among its features my invention embodies a ring-shaped housing having a dome-shaped cover plate at one end into which an axially disposed inlet opening leads to the interior of the ringshaped housing, a cover plate closing the opposite side of the ring-shaped.housing and having a segmental discharge passage opening into an axial discharge through which the drive shaft of the pump extends, means carried by the domeshaped cover plate for supporting the inner end of a drive shaft, and an impeller having radial angularly disposed blades operable within the housing and driven by the shaft.

Other features include an annular reinforcing rim joining the outer edges of the blades, and a removable liner for the housing against which the outer edges of the blades run.

In the drawings:

Figure 1 is an edge view of a pump embodying the features of this invention.

Figure 2 is a vertical sectional view through the pump illustrated in Figure 1.

Figure 3 is a vertical sectional view taken substantially on the line 33 of Figure 1.

Figure 4 is a vertical sectional view taken substantially on the line 4-4 of Figure 1.

Figure 5 is a vertical sectional view taken substantially on the line 5--5 of Figure 2.

Figure 6 is a side view of the pump from the discharge side, showing the drive pulley removed from the drive shaft, and

Figure '7 is a fragmentary enlarged sectional view taken substantially on the line 1-1 of Figure 5.

Referring to the drawings in detail, my improved pump designated generally l comprises a ring-shaped body I I having formed at its lower side a leg l2 to which suitable attaching feet l3 are integrally connected to provide a stand upon which the pump is supported. This ring-shaped body is provided at spaced intervals with transversely extending openings 14 and a suitable liner i is positioned within the body as will be readily seen upon reference to Figure 2,

Secured as by suitable bolts IE to one side of the body H is a dome-shaped cover l1 carrying an axially disposed outwardly extending boss I8 3,1945. Serial No. 634,119

terminating adjacent its outer ends in a screw threaded portion 20 into which a feed pipe 2| is adapted to be entered. Extending transversely of the larger end of the dome-shaped cover I1 is a web 22 provided with a bore 23 which aligns axially with the opening l9 and is fitted with a suitable bushing 24 which forms a bearing for the shaft to be more fully hereinafter described.

Arranged to close the side of the ring-shaped body ll opposite that closed by the dome-shaped cover 11 is a cover 26 formed with an outstanding boss 21 which aligns axially with the boss l8 of the cover plate l1 when the device is assembled and the boss 21 is formed with an internal bore 28 forming the discharge passage for the pump. Communicating with the bore at the inner end thereof is a segmental recess 29 into which the fluid being operated upon is forced by the impeller to be discharged through the bore 28 as will be more fully hereinafter explained. Formed in the boss 21 is a'radial passage 30 the inner end of which communicates with the bore 28 while its outer end is internally screw threaded to receive a discharge pipe 3|. Formed at the extreme outer end of the boss 21 is an internally screw threaded portion 32 which aligns with the bore 28 and is adapted to receive a bearing bushing and packing gland for the impeller shaft as will be more fully hereinafter explained.

Threaded into the threaded portion 32 of the boss 21 is a bearing bushing 33 having an axial bore 34 in which the impeller shaft rotates. This bushing is provided at its outer end with an internally screw threaded socket 35 and a plug 38 is adapted to enter the outer open end of the socket so that its inner end will engage a suitable packing 31 which engages a shoulder formed at the junction of the bore 34 and the socket 35.

Rotatably mounted in the bushing 34 is an impeller shaft 40 the outer end of which has keyed thereto a drive pulley 4| while the inner end is turned down as at 42 to fit in the bearing bushing 24. A stop collar 43 is formed on the shaft 40 in spaced relation to the turned down portion 42 and the cylindrical body 44 formed between the collar 43 and the turned down portion 42 supports an impeller designated generally 45. This impeller comprises a hub portion 46 carrying radial blades 41 which are angularly disposed as illustrated in Figure '7 and outer ends are joined by a reinforcing and stiffening ring 48. The outer ends of the impeller blades 41 ride having an axial bore 19 against the lining 15 of the ring-shaped body ll as will be readily Figures 2 and 5.

In operation it will be understood that the pipe 2| is connected to any suitable source of fluid supply and when the impeller 45 is set into operation the direction of rotation is such that the angularly disposed blades 41 will cause the fluid entering the pump through the passage iii to be driven toward the opposite side of the pump and confined in. the segmental recess 29 pending its discharge through the discharge pasunderstood upon reference to sages 28 and 30. As wear takes place the cover plates I1 and 25 may be readily removed by removing the bolts l6 and a new liner I may be introduced into the ring shaped body II at as frequent intervals as may be required.

While in the foregoing there has been shown and described the preferred embodiment of this invention it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

What I claim is:

1. A pump comprising a ring shaped housing, a dome shaped cover closing one end of, the housing, said cover having an axial fluid inlet opening therethrough, a web extending across the larger end of the domeshaped cover, said web having an opening extending therethrough in axial alignment with the inlet opening, a cover plate closing the opposite end of the housing, said last named cover plate having an axial discharge opening communicating with the housing and a radial discharge passage opening into the discharge opening, a bearing bushing'and packing gland in the end of the discharge opening remote from the housing, an impeller shaft entering the discharge opening through the bearing housing and packing gland, the shaft extending axially through the housing and having its inner end journalled in the opening in the web, a drive pulley on the shaft adjacent its outer end and an impeller screw on the shaft within the housing.

2. A pump comprising a ring shaped housing, a dome shaped cover closing one end of the housing, said cover having an axial fluid inlet opening therethrough, a web extending across the larger endof the dome shaped cover, said web having an opening extending therethrough in axial alignment with the inlet opening, a, cover plate closing the opposite end of the housing, said last named 'cover plate having an axial discharge opening communicating with the housing and a radial discharge passage opening into the discharge opening, a bearing bushing and packing gland in the end of the discharge opening remote from the housing, an impeller shaft entering the discharge opening through the bearing bushing and packing gland, the shaft extending axially through the housing and having its inner end journalled in the opening in the web, a drive pulley on the shaft adjacent its outer end, an impeller screw on the shaft withinthe housing, and a ring shaped liner removablysupported against the inner" periphery of the housing for engagement with the periphery of the impeller screw.

3. A pump comprising a ring shaped housing, a dome shaped cover closing one end of the housing, said cover having an axial fluid inlet opening therethrough, a web extending across the larger end of the dome shaped cover, said web having an opening extending therethrough in axial alignment with the inlet opening, a cover plate closing the opposite end of the housing, said last named cover plate having an axial dis-' charge opening communicating with the housing and a radial discharge passage opening intothe discharge opening, a bearing bushing and packing gland in the end of the discharge opening remote from the housing, an impeller shaft entering the discharge opening through the bearing bushing and packing gland, the shaft extending axially through the housing and having its inner end journalled in the opening in the web, a drive pulley on the shaft adjacent its outer end, an impeller screw on the shaft within the housing, and the cover plate having a segmental chamber in its inner face opening into the housing and into the discharge opening.

JOHN A. ESPY..

REFERENCES CITED I The following references are of record in the file of this patent: v

UNITED STATES PATENTS 

